California lets you install an ignition interlock device to keep driving during a suspension, but only if you meet specific conditions and follow the formal process

California's ignition interlock device (IID) program does allow some drivers to avoid a full license suspension by installing a breath-testing device on their vehicle. However, this option is not automatic, not available to everyone, and requires you to request it through the Department of Motor Vehicles before your suspension takes effect. The device prevents your car from starting if it detects alcohol on your breath.

Whether you can use an IID instead of suspension depends on why your license is being suspended. DUI convictions, certain refusals to take a breath or blood test, and some administrative suspensions may have access to. Other reasons for suspension — like accumulating too many points, driving without insurance, or unpaid tickets — do not. You must also meet timing requirements: for a first DUI, you typically cannot request an IID until at least one month of your suspension has already passed.

Key Takeaways

  • An IID lets you drive during a suspension only for DUI-related suspensions and certain test refusals; it does not work for point-based or administrative suspensions.
  • You must request the IID through the DMV before your suspension begins, or after the mandatory waiting period has passed, depending on your offense.
  • Installing an IID costs money upfront and monthly, and you pay for installation, maintenance, and calibration out of pocket.
  • The device must be installed by a DMV-certified provider, and you must provide proof of installation to the DMV to set up restricted driving privileges.
  • Tampering with, bypassing, or failing the device can result in license revocation and additional criminal charges.

When an IID is available instead of suspension

California Vehicle Code Section 13352.5 allows an IID as an alternative to suspension for specific situations. A first-time DUI conviction qualifies you to request an IID after serving one month of your suspension. A second DUI within ten years requires you to serve one year of suspension before an IID becomes an option. A third or subsequent DUI within ten years does not allow an IID at all — you must serve the full suspension.

Test refusals — when you refuse a breath or blood test after a DUI arrest — also trigger a separate administrative suspension through the DMV. For a first refusal, you can request an IID after serving one month of that suspension. For a second or later refusal, the waiting period is one year.

Suspensions for other reasons do not may have access to. If your license is suspended for accumulating points, driving without insurance, or failure to pay traffic fines, an IID will not stop the suspension. The same applies to suspensions ordered by a court for reasons unrelated to DUI or test refusal.

How to request an IID and the DMV process

You request an IID by submitting a form to the DMV. For a DUI-related suspension, use Form DL 44 or contact your local DMV office to request the IID option. You must make this request before your suspension takes effect, or after the mandatory waiting period has passed. The DMV will not automatically offer this option — you have to ask for it.

Once the DMV approves your request, you have a limited time to install the device. You must use a DMV-certified IID provider; the DMV maintains a list of approved vendors on its website. After installation, the provider sends proof to the DMV. Only after the DMV receives and processes that proof does your restricted driving privilege begin.

The entire process typically takes two to four weeks from approval to set up, depending on how quickly you schedule installation and how fast the provider reports to the DMV. During this time, your license remains suspended — you cannot drive legally until the DMV confirms the device is installed.

What an IID costs and how it works

An ignition interlock device is not free. Installation typically costs between $100 and $300, depending on the provider and your vehicle type. Monthly monitoring and calibration fees range from $60 to $100 per month, and you pay these costs for the entire period you are required to use the device — usually six months to three years depending on your offense.

The device works by requiring you to blow into a breath-testing tube before the engine will start. If the device detects alcohol above a set threshold (usually 0.02 percent), the car will not start. Some devices also require random breath tests while you are driving, and failing one of these rolling tests triggers an alarm and logs the violation. The device records all test results and violations, which the monitoring company reports to the DMV.

You are responsible for all costs associated with the device. The state does not reimburse installation, monthly fees, or removal. If you cannot afford the device, you cannot use the IID option and must serve your full suspension instead.

Restrictions on where and when you can drive

An IID does not give you unlimited driving privileges. California restricts your driving to specific purposes: commuting to and from work, school, medical appointments, court-ordered programs (like DUI education classes), and other activities the DMV deems necessary. You cannot use the device to drive for pleasure, social activities, or errands unrelated to these approved purposes.

Your restricted license will specify these limitations. Law enforcement can stop you and ask why you are driving; if you are outside the approved purposes, you can be cited for violating the terms of your restricted license. The DMV may also require you to carry proof of your IID installation and restricted license status at all times while driving.

What happens if you tamper with or fail the device

Tampering with an IID — attempting to bypass it, having someone else blow into it, or disconnecting it — is a criminal offense in California. Doing so can result in license revocation, additional criminal charges, and potential jail time. The device logs all attempts to tamper with it, and the monitoring company reports these to the DMV and law enforcement.

Failing the device — testing positive for alcohol or missing a required test — also has consequences. A single failed test is typically logged but may not when ready revoke your license. However, repeated failures or a pattern of violations can trigger license revocation and may result in criminal charges for violating the terms of your restricted license.

If your license is revoked while you have an IID installed, you must have the device removed by a certified provider and return proof of removal to the DMV. You cannot straightforward stop using it.

Alternatives if an IID is not an option for you

If your suspension does not may have access to for an IID — because it is point-based, administrative, or related to a third DUI — you have limited alternatives. You can serve the full suspension and then reapply for a license once it expires. You can also explore whether a hardship license might be available, though California has restricted hardship license availability in recent years.

Some suspensions can be challenged through an administrative hearing or by working with an attorney, but this requires legal representation and depends on the specific circumstances of your case. If you believe your suspension was issued in error, you can request a hearing through the DMV within a certain timeframe.

Public transportation, rideshare services, or carpooling with a licensed driver are practical options while your license is suspended. These do not restore your driving privileges, but they allow you to maintain mobility during the suspension period.

Frequently Asked Questions

Can I get an IID for a second DUI right away, or do I have to wait?

For a second DUI within ten years, California requires you to serve one full year of suspension before you become may be able to access to request an IID. You cannot skip this waiting period or request an IID when ready after conviction. After one year has passed, you can then request the device and begin the installation process.

What if I cannot afford the monthly fees for the IID?

If you cannot afford the device, you cannot use the IID option and must serve your full suspension instead. The state does not offer financial information for IID costs, and the DMV does not waive fees based on income. Some providers may offer payment plans, but you would need to contact them directly to ask.

Can I remove the IID early if I have not violated it?

No. You must keep the device installed for the entire period ordered by the court or DMV, even if you have a perfect record with no failed tests. Early removal requires a court order or DMV approval, which is rarely granted. Removing it without authorization is tampering and can result in criminal charges.

Does an IID show up on my driving record or background check?

Yes. The IID requirement and any violations are part of your DMV record and will appear on background checks conducted by employers, insurance companies, and others who request your driving history. This is public information once the device is installed.

What happens if I move out of state while using an IID?

You must maintain the IID in California until your requirement ends, even if you move. Some states have reciprocal agreements with California, but you cannot straightforward transfer the requirement to another state. If you move and stop using the device, your California license will be revoked and you may face additional charges.